September 2017
Intermediate to advanced
1522 pages
83h 42m
English
Content preview from Power Electronics Handbook, 4th Edition
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14.7 Applications of AC-AC Converters
14.7.1 Applications of AC Voltage Controllers
AC voltage controllers are used either for control of the rms value of voltage or current in lighting control, domestic and industrial heating, speed control of fan, pump or hoist drives, soft starting of induction motors, etc. or as static ac switches (on/off control) in transformer tap changing, temperature control, speed stabilization of high-inertia induction motor drives like centrifuge, capacitor switching in static reactive power compensation, etc.
In fan or pump drives with induction motors, the torque varies as the square of the speed. So, the speed control is required in a narrow range, and an ac voltage controller is suitable for an induction motor ...
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